Advancements in the design and optimization of plasmonic bandpass filters for enhanced optical communication systems: a comprehensive review

Abstract

AbstractThe rapid evolution and complexity of optical communication systems demand continuous advancements in key components, particularly bandpass filters, to ensure efficient signal transmission and reception. Plasmonic bandpass filters, leveraging surface plasmon polaritons (SPPs), exhibit great potential in achieving precise spectral filtering and compact integration. In this comprehensive review, we explore recent strides in plasmonic bandpass filter design and optimization, emphasizing their crucial role in enhancing optical communication systems. Relevant databases such as Scopus, Web of Science, and Google Scholar were utilized to gather and analyze pertinent research articles. The inherent properties of plasmonic materials, facilitating subwavelength-scale light manipulation, make plasmonic bandpass filters attractive for optical communication applications. Control over transmission and rejection bands is vital for optimizing optical channels and minimizing crosstalk in networks. However, challenges such as material losses, fabrication complexity, and integration constraints persist. The review encompasses in-depth discussions on material choices, geometric design strategies, and optimization techniques in plasmonic filter design. Advancements in fabrication methods, including nanolithography and chemical synthesis, have significantly refined filter production. The emergence of machine learning-assisted design and nonlinear plasmonic effects showcases exciting future prospects. In conclusion, while challenges remain, the future of plasmonic bandpass filters is promising. Emerging trends such as nanophotonic integration, active tunability, and metasurface-based designs are reshaping the landscape. Overcoming current obstacles will propel plasmonic bandpass filters toward a future where they play a pivotal role in enabling high-capacity and adaptable optical communication systems.